hadley



PAGE & HADLEY.

Calipers.

Nao. 99,698. Patented Feb. 8, |870.

M5865" fU/az'om- @7,1% m mm@ To all whom 'it may concern.-

'i i lnitiitete @anni @imite T. C. PAGE AND GEORGE W. HADLEY, 0F ,CHICOPEE MASSACHUSETTS.

Letters Patent N 99,698; dated February 8, 1870.

I MPRovEMnN-i' INcALIPERs.

The Schedule referred tu in these Letters Patent and making part o! the same.

Be it knownthat Awe, T. C. PAGE and GEORGE W. HADLEY, both of Chieopee, in the county of *Hamps den, and State of Massachusetts, have invented lm- .proved Galipers; and we do hereby declare the. followv ing to be a full and correct description of the same,

rele-relie beingrhad to the accompanying drawings, in

'hieh-` Y Figure I is' a side elevation of our calipers; Figure 2,' a top view of the same; 'and Figure 3, a detached view of the slotted screw, forming the bridle or yoke.

The saine letter indicates the same part wherever it' The nature of our invention consists in forming calipers of wire, the spring-head beingformed ot'.a coil, and the legs being passed through a bridle or yoke, consisting of a slotted screw, and adjusted byal-nut playing onl the outside of said screw, thejvhole forming a cheap and uset'ul instrument,-possessing largecompass and flexibility and great durability, all as hereinafter more fully set forth. v 1- Y To enable others to make and use our improved calipers, we proceed to describel their construction and operation, referring tothe drawing forming part of this speciticaton.

ln the dlawing- 'y v A marks the coiled spring formingtbe hadof the calipers;

. B B, the legs of the instrument; .Y

0,'the slot-ted screw; and D, thenut for adjusting the compass. In tig. l, d b c are the-coils of the wire, forming the head ofthe calipers, and in tig. 3, s :marks the slot in the screw C. 4 Y The calipersV are formed'of a single piece of common wire, of a size proportionate to that ofthe instrument to be made. It is coiled in the middle, to form a spi- Vral spring, A, and flattened at the ends to the proper size for the points of the limbs.

These are then passed through the slots of. the screw C, and receive thc proper curved form.

A threaded nut, D, playing on the outside of screw C, affords the means ot' adjusting the rompass of the 'l points. The screw O is not fixed to either limb of the calipers,butis loose upon both, heilig retained in place by the curvature of the legs B B.

We have described our invention as applicablerto calipers, but itis obvious thatl it is equally applicablev to dividers, and we have, in fact, 'applied it in their,

WVliat we claim, and dcs'ir'uto sec-iure by Letters l. rlhe lnidle or yoke C, made of a loose slottedA screw, applied so as to embrace the legs ot'ealipcrs,

and provided with a nnt, D, substantially as specified. 2. Calipers Vmade of common vwire, in the manner described, having a coiled-spring head and legs, confined by a slotted screw-yoke, and adjusted by a threaded nut, all as and for the purpose set forth.

The above specification of our said invention signed and witnessed at Chicopee, this 1st day of September',

T. o. PAGE. Y GEO. W. HADLEY.

Witnesses:

.ALBERT PERKrNs, GaAs. M.. TAYLOR. 

